iReboot won't let me boot Windows 8

New Member

I have Windows 8 Pro and Ubuntu 12.04.2 Server installed on my system and I wanted to easily reboot into Ubuntu. So I installed iReboot.
There I've checked to boxes, "Ubuntu" and one other (can't really remember).
From there on my PC only reboots into Ubuntu. I have no chance to get Windows to boot. Fast-Boot is disabled, I've rebuild the BCD and tried this by using the Repair-Utility from my recovery-cd.
Nothing help.

So if you have any idea how to fix this issue from within Ubuntu (as it's the only OS I could use at the moment) would be great!!